A close-coiled helical extension spring, with ends fastened together to form a circle, designed to impose compression stresses toward the center of the circle thus formed when uniformly expanded.
NSN 5930-01-468-6136
NSN 6620-01-299-3130
NSN 6135-00-134-6648
NSN 5985-01-476-9749
NSN 6105-00-557-3984
NSN 6320-01-643-0850
NSN 4140-00-393-1707
NSN 6220-01-454-4022
NSN 5930-01-535-0280
NSN 6610-01-587-6068
NSN 6650-00-504-2999
NSN 5920-01-400-3562